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/**
* Tests that time-series collections can be sharded and that queries return correct results.
*
* @tags: [
* requires_fcv_49,
* requires_find_command,
* ]
*/
(function() {
load("jstests/core/timeseries/libs/timeseries.js");
load("jstests/sharding/libs/find_chunks_util.js");
Random.setRandomSeed();
const st = new ShardingTest({shards: 2, rs: {nodes: 2}});
const dbName = 'test';
const sDB = st.s.getDB(dbName);
const configDB = st.s0.getDB('config');
if (!TimeseriesTest.timeseriesCollectionsEnabled(st.shard0)) {
jsTestLog("Skipping test because the time-series collection feature flag is disabled");
st.stop();
return;
}
// Simple shard key on the metadata field.
(function metaShardKey() {
assert.commandWorked(
sDB.createCollection('ts', {timeseries: {timeField: 'time', metaField: 'hostId'}}));
// Insert directly on the primary shard because mongos does not know how to insert into a TS
// collection.
st.ensurePrimaryShard(dbName, st.shard0.shardName);
const tsColl = st.shard0.getDB(dbName).ts;
const numDocs = 20;
let docs = [];
for (let i = 0; i < numDocs; i++) {
const doc = {
time: ISODate(),
hostId: i,
_id: i,
data: Random.rand(),
};
docs.push(doc);
assert.commandWorked(tsColl.insert(doc));
}
// This index gets created as {meta: 1} on the buckets collection.
assert.commandWorked(tsColl.createIndex({hostId: 1}));
st.shardColl('system.buckets.ts',
{meta: 1} /* Shard key */,
{meta: 10} /* Split at */,
{meta: 10} /* Move the chunk containing {meta: 10} to its own shard */,
dbName, /* dbName */
true /* Wait until documents orphaned by the move get deleted */);
let counts = st.chunkCounts('system.buckets.ts', 'test');
assert.eq(1, counts[st.shard0.shardName]);
assert.eq(1, counts[st.shard1.shardName]);
// Query with shard key
assert.docEq([docs[0]], sDB.ts.find({hostId: 0}).toArray());
assert.docEq([docs[numDocs - 1]], sDB.ts.find({hostId: (numDocs - 1)}).toArray());
// Query without shard key
assert.docEq(docs, sDB.ts.find().sort({time: 1}).toArray());
assert.commandWorked(sDB.dropDatabase());
})();
// Create a time-series collection with a non-default collation, but an index with the simple
// collation, which makes it eligible as a shard key.
(function metaShardKeyCollation() {
assert.commandWorked(sDB.createCollection('ts', {
timeseries: {timeField: 'time', metaField: 'hostName'},
collation: {locale: 'en', strength: 1, numericOrdering: true}
}));
// Insert directly on the primary shard because mongos does not know how to insert into a TS
// collection.
st.ensurePrimaryShard(dbName, st.shard0.shardName);
const tsColl = st.shard0.getDB(dbName).ts;
const numDocs = 20;
let docs = [];
for (let i = 0; i < numDocs; i++) {
const doc = {
time: ISODate(),
hostName: 'host_' + i,
_id: i,
data: Random.rand(),
};
docs.push(doc);
assert.commandWorked(tsColl.insert(doc));
}
// This index gets created as {meta: 1} on the buckets collection.
assert.commandWorked(tsColl.createIndex({hostName: 1}, {collation: {locale: 'simple'}}));
st.shardColl('system.buckets.ts',
{meta: 1} /* Shard key */,
{meta: 'host_10'} /* Split at */,
{meta: 'host_10'} /* Move the chunk containing {meta: 10} to its own shard */,
dbName, /* dbName */
true /* Wait until documents orphaned by the move get deleted */);
let counts = st.chunkCounts('system.buckets.ts', 'test');
assert.eq(1, counts[st.shard0.shardName]);
assert.eq(1, counts[st.shard1.shardName]);
// Query with shard key
assert.docEq([docs[0]], sDB.ts.find({hostName: 'host_0'}).toArray());
assert.docEq([docs[numDocs - 1]], sDB.ts.find({hostName: 'host_' + (numDocs - 1)}).toArray());
// Query without shard key
assert.docEq(docs, sDB.ts.find().sort({time: 1}).toArray());
assert.commandWorked(sDB.dropDatabase());
})();
// Create a time-series collection with a shard key compounded with a metadata subfield and time.
(function compoundShardKey() {
assert.commandWorked(
sDB.createCollection('ts', {timeseries: {timeField: 'time', metaField: 'meta'}}));
// Insert directly on the primary shard because mongos does not know how to insert into a TS
// collection.
st.ensurePrimaryShard(dbName, st.shard0.shardName);
const tsColl = st.shard0.getDB(dbName).ts;
const numDocs = 20;
let docs = [];
for (let i = 0; i < numDocs; i++) {
const doc = {
time: ISODate(),
meta: {id: i},
_id: i,
data: Random.rand(),
};
docs.push(doc);
assert.commandWorked(tsColl.insert(doc));
}
// This index gets created as {meta.id: 1, control.min.time: 1, control.max.time: 1} on the
// buckets collection.
assert.commandWorked(tsColl.createIndex({'meta.id': 'hashed', time: 1}));
assert.commandWorked(st.s.adminCommand({enableSharding: 'test'}));
assert.commandWorked(st.s.adminCommand({
shardCollection: 'test.system.buckets.ts',
key: {'meta.id': 'hashed', 'control.min.time': 1, 'control.max.time': 1}
}));
let counts = st.chunkCounts('system.buckets.ts', 'test');
assert.eq(1, counts[st.shard0.shardName], counts);
assert.eq(0, counts[st.shard1.shardName], counts);
// Split the chunk based on 'bounds' and verify total chunks increased by one.
const lowestChunk = findChunksUtil.findChunksByNs(configDB, 'test.system.buckets.ts')
.sort({min: 1})
.limit(1)
.next();
assert(lowestChunk);
assert.commandWorked(st.s.adminCommand(
{split: 'test.system.buckets.ts', bounds: [lowestChunk.min, lowestChunk.max]}));
let otherShard = st.getOther(st.getPrimaryShard(dbName)).name;
assert.commandWorked(st.s.adminCommand({
movechunk: 'test.system.buckets.ts',
find: {'meta.id': 10, 'control.min.time': 0, 'control.max.time': 0},
to: otherShard,
_waitForDelete: true
}));
counts = st.chunkCounts('system.buckets.ts', 'test');
assert.eq(1, counts[st.shard0.shardName], counts);
assert.eq(1, counts[st.shard1.shardName], counts);
// Query with shard key
assert.docEq([docs[0]], sDB.ts.find({'meta.id': 0}).toArray());
assert.docEq([docs[numDocs - 1]], sDB.ts.find({'meta.id': (numDocs - 1)}).toArray());
// Query without shard key
assert.docEq(docs, sDB.ts.find().sort({time: 1}).toArray());
assert.commandWorked(sDB.dropDatabase());
})();
st.stop();
})();
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